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Finding the Fourth Proportional to 402,806.64, 555,862.06 and 221,518.56

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Solution

The fourth proportional to 402,806.64, 555,862.06 and 221,518.56 is: 305,689.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,806.64 : 555,862.06 = 221,518.56 : x
  2. Step 2: Convert to fraction form
    402,806.64/555,862.06 = 221,518.56/x
  3. Step 3: Cross multiply
    402,806.64x = 555,862.06 × 221,518.56
  4. Step 4: Simplify right side
    402,806.64x = 123,133,763,089.83
  5. Step 5: Solve for x
    x = 123,133,763,089.83/402,806.64
  6. Step 6: Final answer
    x = 305,689.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.